from rest_framework.views import exception_handler as drf_exception_handler
from rest_framework.response import Response
from rest_framework import status
from django.db import DatabaseError
from redis.exceptions import RedisError

import logging

# 获取在配置文件中定义的logger，用来记录日志
logger = logging.getLogger('django')

def exception_handler(exc,context):
    """
    自定义异常处理

    :param exc: 异常
    :param context: 抛出的异常的上下文
    :return: Response响应对象
    """
    # 调用drf框架原生的异常处理方法
    resposne = drf_exception_handler(exc,context)

    if resposne is None:
        view = context['view']
        if isinstance(exc,DatabaseError) or isinstance(exc,RedisError):
            # 数据异常
            logger.error('[%s] %s' % (view,exc))
            response = Response({'message':'服务器内部异常'},status=status.HTTP_507_INSUFFICIENT_STORAGE)
    return resposne